Looks like Hollywood’s hottest couple can still be competitive — HollywoodLife.com has EXCLUSIVE details about what really happened on their date!

Justin Bieber and Selena Gomez got down at a private New Year’s Eve party in New York City on Dec. 31, and HollywoodLife.com has EXCLUSIVE info on what they did!

Justin, 17, and Selena, 19, partied all night at a swanky private party in NYC hotspot Glass House. The shindig — celebrating Justin’s performance earlier in the evening on Dick Clark’s New Year’s Rockin’ Eve with Ryan Seacrest 2012 — rocked until 3 a.m., and the lovebirds had a blast!

An eyewitness tells us that the pair was totally normal and fun on the dance floor.

“They were dancing a lot with all of their friends,” the eyewitness said. “He picked her up swing dancing-style as they engaged in a dance circle, having a dance contest with each other. Later, Selena looked on while he tried out Skylanders: Spyro’s Adventure, a video game that was sponsoring the night. There was heavy PDA throughout the night between them both. They’re very much in love and have some great close friends and handlers.”